Andrew patterson



. JOHN DEAN,

iinittd time @sind ANDREW PATTERSON, .0F WORCESTER, MASSACHUSETTS, 'ASSIGNGR TO 0F SAME PLACE.

Letters PatentNo. 106,501,1date1l August 16, 18T

IMPROVEMENT IN NAILS.

To all whom ityliuty concern.-

Be it known that I, ANDREW Vorcester, in the county of Worcesterand State of Massachusetts, have invented a new and useful Improvement, in Nails; and I d'0 hereby declare that theillowing is a full and exact description of thc same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

This invention consists of au improvedrtrnnk, can4 pet, or furniture-tack or nail, of that class having large rounded or concave heads.

Tanks or nails, of large and Vround heads, cannot hc made of' the same 'piece with the-shank, and by the same process.

Hitherto it has heen customary to make them,-

by forming head and tack separate, and then solderq ing the tack into the head, or the tack is thrust through the center of a diskofpasteboard or other material, and the disk then coated with copper', brass, or other suitable metal, another piece of' pasteboard, or other material, beiugsometimes placedabove. said disk, and beneath said covering of copper, brass, or

`other metal.

ihesc processes, of course, involve considerable manipulations, and, in addition, furnish a defective article, the head being liable to become crushed or separated from the shan The parts and-completed tack are formed by the steps hereinafter set forth.

iisks oi' thin metal are cut ci proper size and punched `with holes, as shown in iig. 1, the hole loeing hfft jagged, or enough metal being left to be bound tightly to the shank.

lhrongh this hole the tack or nail, of suitable. con- PATTERSON, of'

struction, as shown in ng. il, is thrust, till the head rests against the jagged or tightv-fittiug sides ofthe hole. I

4By a blow the parts are forced together, and the edges are imbedded in lthe shaft of the nail, making thewholepractically homogenous in structure.- Atthe same time the' head can be easily stamped into proper shape, and the nail completed, by simple and inexpensive process.

When completethit has also the advantage of otering the head of the nail itself, or the shank, to the blows of driving, since the'shank projects through the disk which forms the head.

Thus, the head is not liable to displacement in the act of driving, and is h eld thereafter. tirmlyin place.

.I do not claim a tack made of head and shank soldered together, nor of' pasteboard or other similar head, strengthened by casting of brass or other metal; and I am aware that a solid cap has been swaged onto the head of a nail over the head; but

What I do claim, and desire to secure by Letters Patent of the United States, is-

An improved tack or nail f'oi'medoi a disk provided with jagged or other hole, `into which the shank is inserted and imbedded by swaging, iu such manner thatthe head protrudes through and is exposed to the force of the blow, as described.

This specification signed and -witnessed this 22d day of June,- 1870. AN DREW PATTERSON.

Witnesses:

T. L. NELSON, B. W. POTTER. 

